1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0656791a04cafda634ed517664ae74060259cbed4f62b49c2f6d538a349415. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cea83aaa-a492-48ed-8dc4-a959958b7d3b.json and https://artists.proofprofile.net/proofs/artist/cea83aaa-a492-48ed-8dc4-a959958b7d3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe226a60ae22fa69ec0e6098714961a3dc63df4b5ac539d1cd46516f77f271093. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:31:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81762186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dd2dadad63222005dbabc9f7605b59f15b565a51990ba54001f654dec95a60. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:58:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81762188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc459ba5f38d6ca1f2380b54ee3de6459a963e21251105d6ab265482adf73ca85. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1806016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54769b688a11ccdc897d790aec5fb6de8cc2450d8de850df017e6be68a4f7f82. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1806018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac66b4a468cf99b97f281f9e36408b2b511038ef9dd383a1e5133c8329f7397. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T09:54:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1806022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d54d58de70666a6460ec8a976df8305f455e225e2031472debf9f140186e9e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:00:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91826648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e4c67d8d0e8cb0820e2a07b3ce3797314f36d7d20b3f61812748b4ca1552db. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:16:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91826649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1912c64702a48fb639299d9f6c23e0b651c14bc0d64ab6cb32ae0a2d191d26ad. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91826651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff414d26b91acd39f04c8285664f44d295aec4a82a90aaf87095600ed06d8171. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1880035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6ff515abbc9f7b9f71155a7b68be795d0903b5972003b798c816f9dd5d7d37. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1880036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e3004bda05a963331332acbab2b58a9661963288e41f5b8673c77be78f1d95. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:52:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1880038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217c275fe7c6a3a8345a94c6abe8c8c747c0fbb9f439c14d08488604966b1888. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:59:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2069271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb752a9bc57048cd866132a4b5ddfcd9140e5033fff630d9d4dd996b1b73d2bc7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:36:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2069274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fe795010497d72a37777ee40b159c78489122b0c1c82c54cdce7168b5c4b90. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:13:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2069275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f927d8feb6cc48ebfee83e980bd960bce169776154e28f8613ec4acc545a57c. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2188046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76b1b1f10abbf0d124ef91800ae54139da4c59014cc14c90894d889e6233770. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2188047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9017e17102a505bc4675ea62ff4c8f8950e85f721530a3090653e06a0b3c2c3a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2188048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64f4045564af2d4ac37ba7397cbfe22d6ebcd2d1cbf46bb9cd619c057d24a82. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2188049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ee1f231e2cc51065acffc464f8239a4d6888db4aaddb626f640e01a6c9927b. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2188050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0430d091e431a268d26c4a4e00ea85226924ee09350528c8a8f7e5a3638d8d4. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:04:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2188054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2923f1b902e85d5b1b3ac034c2c06a50e81df073bd8789a372e27bb93abc2ed. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2188055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab46f4c65348696aecfee4a30798f70d326c3e5bf2e4870f763e64f3ea9eafe1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2124922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4d720a50782c2aca44ab72dad02a956df6424d8cf07dccec6f17337eb147f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY42221036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb36b6cc72a4ae7c3575f280329b524ed4c452eb7702b835686d02ec74bc2cfc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q2326027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbe78b1ab00a932c0550a177028aede3f17521cc94974571c88b8f2b41d9635. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q2326030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ecf3c169572667f5386667100cc89c0cf3807da12be2b703b1e781df520e6c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q2326031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa503404bd97d6d76fbf023067cf46def4496cb980fca5a3efe72cc6bb88b12f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q2326032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc295586a3bd536fb2242bd31b9d90b7a7d0f48c99c984e818b291317c9e00123. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q2326033.